Clear JSON buffer.

wled00/ir.cpp

@@ -676,6 +676,7 @@ void decodeIRJson(uint32_t code)
       if (!cmdStr.startsWith("win&")) {
         cmdStr = "win&" + cmdStr;
       }
+      fdo.clear(); //clear JSON buffer (it is no longer needed)
       handleSet(nullptr, cmdStr, false); // no colorUpdated() call here
     }
   } else {